I am having some problem with an E-shaped F minor 7th barre chord. No matter what I do, it seems impossible to barre 5 strings (and even if I manage somehow to do it, it's very shaky and not clean at all). Any advice what should I do?
If you can successfully barre in other fret locations, then your difficulty may be related to the guitar setup -- specifically, the nut may be too high. As a beginner, I would let someone experienced inspect the instrument and offer their opinion.
Note that guitar setup involves a number of interrelated factors.